James Morton had plied his young victim with alcohol before strangling her

Morton eventually called emergency services just after midnight, 20 minutes after Hannah stopped breathing.

Judge Mrs Justice Carr told the court: “You chose to engage in sexual activity which you knew to be dangerous with a very young drunk girl whom you had only met that afternoon and who, as you realised at the time, had never engaged in this type of activity before.

“Hannah was to your knowledge very drunk. She was also very young and vulnerable, and alone in a strange house. Indeed, you accepted in your evidence that you felt responsible for her.

She said that Morton had “enjoyed the domination”, having already tried it with a previous girlfriend.

She added: “I am sure, as the jury was, that Hannah did not give valid and informed consent to this escalated activity in the knowledge that it carried the risk of some bodily injury.

“She was in no position to object, trapped underneath you whilst you strangled her.”

MOST READ IN NEWS

VAPING FEARS

E-cigarettes are MORE harmful than first feared, experts warn

TRAGEDY

One dead after two struck by trains in separate incidents in Pitlochry and Glasgow

SIGNS OF ANARCHY

'I WENT DOWN WITH IT'

In a devastating impact statement to the court, Hannah’s mother Dawn Pearson said: “Hannah was the most beautiful daughter you could ask for.

“To have the police knock at your front door and tell you your daughter has been killed is a parent’s worst nightmare.

“This is the nightmare we are living with every single day.”

She said that Hannah had struggled with anorexia from the age of 11 but had recovered, embracing life to the full.

She said: “The hurt and pain we feel is indescribable, the physical pain we feel in our hearts is suffocating. We so desperately want to see her walk through our front door again, see her beautiful smile, but we can’t.”